Hydrostatic indicator for weighing-scales



(No Model.)

H. A. LEWIS.

HYDROSTATIO INDIGATOR FOR WEIGHING SCALES. No. 397,464. Patented Feb. 5,, 1889..

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UNITED STATES PATENT Orrtcie.

HENRY A. IiElVIS, (ll? FORT 'Oll'lll, TEXAS.

HYDROSTATIC INDICATOR FOR \NEIGHING SCALES.

SPECIFICATION forming part of Letters Patent No. $97,464:, dated February 5, 1889. iApplication filed October 8, 1887. Serial No, 251,803. (No model.)

To all 2/;7L071L it may concern:

Be it; known that I, HENRY A. Lewis, a citlzen of the United States, formerly of ,llenrictta, in the county of (lay and State ol'i Texas, but now residing at Fort \Vorth, in.

the same State, have invented certain new and l useful Improvements in Hydrostatic Indicators for Scales, of which the following is so full, clear, and enact a description as will cnable others skilled in the art to which my invention appertains to make and use the same, reference being had to the accompanying drawings, in which Figure 1 is a longitudinal vertical section of my scales, showing the registering-(Iial and part of feed-pipe in front view. Fig. 2 is a view of my scales vertically projected onto a horizontal plane cutting them anywhere be tween the bearing-plate and the registeringdial. voir.

In the drawings the same letters indicate correspoiuling parts in all the views.

The. object. of my invention is to provide a hydrostatic scale in which the column of tluid shall not be the standard of weight, thus getting rid of the otherwise inevitable sources of error present in the slight inequalities ofborc in the stand-pipe.

Another object of my invention is to provide a hydrostatic scale in which the action shall be so rapid, and withal so exact, as to enable any man who can read a dial to take the weights of loaded stock-cars while in motion.

Another object of my invention is to con 1 struct and provide a hydrostatic scale which shall be compact and light and yet capable of registering the weights of heavy loads.

In' the, following specification I shall confine myself to the description of those parts which are essential to those parts of the device which Fig. 3 is'a front view of the t'eed-reser- 7 side of the ring a2 and serves to hold packlng and should be nonviscid. l'pon the pipe (1' are situated two valves, .I and (F, the former being provided with a stop-cock and the latter being automatic, and also capable of being opened and closed by means of a stop-cock.

A little above the entrance oil the pipe 17 into the cylinder the bore of the cylinder is increased and a shoulder, I), is formed. This shoulder may extend entirely around the inner circumference of the cylinder or only partly around it. tllosely titting the outer hollow cylinder, l),isthciunerhollow cylinder, B. This hollow cylinder is closed at the top, save for a screw-tbreaded aperture, l), into which the vertical stand-pipe is screwed, as shown at (l. llhtwinter cylinder isagainwidcued in. bore by the addition of the ring Ill, and the eonsetptent formation of the contin uous shoulder D which serves as a seat for the flanged ring A, which screws into the iiiin place against said seat, as shown in the figure at D Surrounding the stand-pipe (3, and extend ing across the top of the main cylinder D, the bearing-bar E. Two stout bars, F, extend down ward past the main cylinder and are attached, underneath the beam A and separate fromit, to the under bar, E This under bar extends across the bottom of the su ilportingbeam A, and is provided with a hook, M, on its under side, to which the lever-train of the scales is connected. This lever-train may belong to any system, as it forms no part of my device. The manner in which the weight of the car is transmitted to the hook M isimmat'erial, as my invention relates to the means of registering'the weight so transmitted. The two chains shown at II are intended for the purpose ol releasing thescalcs from the weight instantancouslyat yvilhanthbcing common to many kind of scales, are immaterial to my device in itself.

The opcratitm of my scales will then be as follows: The reservoir K being placed above the line of the registeriiig-dial It, upon opening the STOP-POClC .I the liquid will flow down into the cylinder, standpipe, and dial, and will, doubtless, at first till these passages so full as to make the needle or hand 'ou'lthe dial stand a little off of the Zero-point; but by pressing upon the bearing-bar E a sufficient quantity of iiuid maybe forced back into the reservoir to bring the needle exactly to the zero-point again. This once accomplished, any motion of the cylinder I downward in the cylinder 1) will only serve to force the liquid up into the registering-dial L, which may be any one of the many forms of spring-dial on the market. The liquid can take only this direction, as the automatic check-valve (Z is so constructed as to permit the passage of l'luids down from the reservoir only when the stop-cock shown in the figure is turned to permit the reflux of the fluid up into the reservoir. The weight then having been transmit-ted through the system of levers to the hook M in such a way as to bear down upon said hook, the bar E will be depressed, and by means of the side bars, F, this downward motion will be transmitted to the bearing-bar E, which is thus made to press down upon the top surface of the inverted closed cylinder 1- forcing it down into the cylinder D, and forc ing the contained fluid up into the registering-dial L, through the stand-pipe G, and thus registering the weight upon said dial. The cylinder B being bored out, as seen at C, it is capable of containing a considerable quantity of fluid, and hence of supplying a registering apparatus of very large capacity, such as is necessary in the weighing of loaded stock'- cars.

Having now described the objects, uses, and advantages of my invention, what I believe to be new, and desire to secure by Letters Patent, and what 1 therefore claim, is

1. In a hydrostatic indicator for scales, a

hollow inner cylinder, and a second outer cylinder, within which the inner cylinder slides, said inner cylinder being provided with a vertical stand-pipe directly over it, in combination with a registering-dial attached to the top of the stand-pipe, all constructed to oper ate substantially as and for the purposes specified.

In a hydrostatic indicator for scales, a hollow inner cylinder, and a second outer cylinder, within which the inner cylinder slides, a stand-pipe attached to said inner cylinder, and a registering-dial, in combination with a bearing-bar, side rods, and under bar, forming a frame bearing upon the top of said inner cy1-' inder, all constructed to operate substantially as and for the purposes specified.

3.- In a hydrostatic indicator for scales, a reservoir, an outer cylinder, a hollow inner cylinder, an attached stand-pipe, and registering-dial, said inner cylinder being surrounded by and sliding within said outer cylinder, said outer cylinder being provided with an attached inlet-pipe communicating with said reservoir, said pipe being provided with two valves, in combination with a bearingbar, side rods, and under bar, forming a frame bearing upon the inner cylinder, substantially as described.

In testimony that I claim the above as my invention I hereunto set my hand, in the presence of two witnesses, this 8th day of October, 1887.

HENRY A. LEIVIS.

Witnesses:

CHAS. E. BARBEN, FRANK DORIAN. 

